Manually closable vacuum cleaner bag

ABSTRACT

A manually closable collar for a vacuum cleaner bag is adapted to be secured to an air bag. The collar is formed from a single blank of relatively rigid material folded to define three overlying and generally planar panels. Each of the panels defines an aperture therethrough, the apertures being initially aligned in the collar to enable the passage of air therethrough and into the air bag. The middle panel of the collar defines (i) a fixed raceway element adhesively secured to at least one of the outer panels of the collar, and (ii) a detachable slider element secured to the raceway element only by various nicks. The slider element has a first portion defining the aperture of the middle panel and a second portion which is unapertured. When detached from the raceway element by a user breaking the various nicks, the slider element is manually slidably movable (either longitudinally or rotatably) from a first or open position, wherein the aperture of the middle panel is aligned with the apertures of the outer panels, to a second or closed position, wherein the second portion blocks air flow between the apertures of the outer panels.

BACKGROUND OF THE INVENTION

The present invention relates to a disposable vacuum bag for use in avacuum cleaner and, more particularly, to one having a manually closablevacuum bag collar.

The disposable vacuum bags for use in a vacuum cleaner are typicallyprovided with collars having closure means such that, when the vacuumbag is removed from the vacuum cleaner after use, it may be closed orsealed to retain therein the dirt and like particulate matter trapped inthe bag. While great ingenuity, time and effort have been directed tothe provision of a reliable automatically closable collar--that is, acollar which is reliably self-sealing upon removal from the air intakepipe of a vacuum cleaner--many disposable vacuum bag users still preferthe certainty of a manually closable collar--that is, a collar which theuser himself seals after removal of the Vacuum bag from the air intakepipe.

A wide variety of manually closable collars have been available on themarket at one time or another. Many of them require the presence of aneasily flexible portion enabling movement of a closure member from onelocation to another. The provision of an easily flexible collar portion,of course, makes for a complex and hence costly collar. While the basicvacuum bag may have only a three-ply collar, some of the manuallyclosable constructions require additional layers, thus increasing thematerial cost and manufacturing expense of producing such bags. Finally,in the known three-ply collars of manually closable bags not requiring aflexible collar portion, higher production costs are involved. Once thecollar has been appropriately folded, the fold between the closuremember and another ply of the collar must be cut in order to free theclosure member for movement relative to the remainder of the collar.This extra processing step entails additional manufacturing expense aswell as the waste of a certain amount of the raw material since a foldbetween the closure member and another ply must be cut away anddiscarded.

Accordingly, it is an object of the present invention to provide amanually closable collar for a vacuum cleaner bag, which collar iseconomical to manufacture (as it does not require the collar to includea flexible portion) and easy to manufacture (as it does not require afinal cutting step in order to free the closure member for movementrelative to the remainder of the collar).

SUMMARY OF THE INVENTION

It has now been found that the above and related objects of the presentinvention are obtained in a manually closable collar for a vacuumcleaner bag comprising a collar adapted to be secured to an air bag. Thecollar is formed from a single blank of relatively rigid material foldedto define three overlying and generally planar panels. Each of thepanels defines an aperture therethrough, the apertures being initiallyaligned in the collar to enable the passage of air therethrough and intothe air bag. The middle panel of the collar defines (i) a fixed racewayelement adhesively secured to at least one of the outer panels of thecollar, and (ii) a detachable slider element secured to the racewayelement only by various nicks. The slider element has a first portiondefining the aperture of the middle panel and a second portion which isunapertured. When detached from the raceway element by a user breakingthe various nicks, the slider element is manually slidably movable froma first or open position, wherein the aperture of the middle panel isaligned with the apertures of the outer panels, to a second or closedposition, wherein the second portion blocks air flow between theapertures of the outer panels.

In a preferred embodiment, the raceway element includes means forprecluding removal of the slider element entirely from the racewayelement after the slider element is detached from the raceway element.The slider element additionally includes means extending beyond theouter panels and enabling manual grasping of the slider element fordetaching of the slider element from the raceway element and formovement thereof from the first or open position to the second or closedposition. In a first embodiment, the slider element is axially slidablymovable from the first or open position to the second or closedposition; in a second embodiment, the slider element is rotatablyslidably movable from the first or open position to the second or closedposition.

The collar preferably additionally includes a resilient membraneintermediate the middle panel and one of the outer panels, the membranedefining an aperture therethrough aligned with the apertures of theouter panels and with the aperture of the middle panel when the sliderelement is in the first or open position.

The present invention also encompasses a method of making a manuallyclosable collar for a vacuum cleaner bag from a single collar blank. Thesteps include folding a single collar blank of relatively rigid materialto define three overlying and generally planar panels. Each of thepanels defines an aperture therethrough, the apertures being initiallyaligned in the folded blank to enable the passage of air therethrough.The middle panel of the collar defines a fixed raceway element and adetachable slider element secured to the raceway element only by variousnicks. The slider element has a first portion defining the aperture ofthe middle panel and a second portion which is unapertured. The racewayelement is adhesively secured to at least one, and preferably both, ofthe outer panels. When detached from the raceway element by the user ofthe vacuum bag breaking the various nicks, the slider element ismanually slidably movable from a first or open position, wherein theaperture of the middle panel is aligned with and enables air flowbetween the apertures of the outer panels, to a second or closedposition, wherein the second portion is aligned with and blocks air flowbetween the apertures of the outer panels.

In a preferred embodiment, the method includes the initial step ofpreparing the middle panel for folding by severing the slider elementfrom the raceway element except for the various nicks, and theadditional step of disposing a resilient membrane intermediate themiddle panel and the other of the outer panels, the resilient membranedefining an aperture aligned with the outer panel apertures.

BRIEF DESCRIPTION OF THE DRAWING

The above and related objects, features and advantages of the presentinvention will be more fully understood by reference to the followingdetailed description of the presently preferred, albeit illustrative,embodiments of the present invention when taken in conjunction with theaccompanying drawing wherein:

FIG. 1 is a front plan view of a blank for making a first embodiment ofthe collar according to the present invention;

FIG. 2 is a view similar to FIG. 1, but showing a resilient membrane onthe first panel and glue on the third panel;

FIG. 3 is a view similar to FIG. 2, but with the third panel pivoted tooverlap the second panel, the third panel also being seen in phantomline in an intermediate orientation;

FIG. 4 is a view similar to FIG. 3, but with the first panel pivoted tooverlap the second and third panels, the first panel also being seen inphantom line in an intermediate orientation;

FIG. 5 is a front plan view, to an enlarged scale, of the collar withthe closure member of the second panel in the closed position;

FIG. 6 is a sectional view taken along the line 6--6 of FIG. 5 with theclosure member in the open position;

FIG. 7 is a sectional view taken along the line 7--7 of FIG. 5 with theclosure member in the closed position;

FIG. 8 is a fragmentary view, to a greatly enlarged scale, of a portionof FIG. 6; and

FIGS. 9-15 are views similar to FIGS. 1-7, but of a second embodiment ofa collar according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawing, and in particular to FIGS. 1-7 thereof,therein illustrated is a first embodiment of the present invention,generally designated by the reference numeral 10. Referring now to FIG.1, therein illustrated is a single piece paperboard blank, generallydesignated 12, for a manually closable (or manually sealable) collar,generally designated 30, for a vacuum cleaner bag (not shown). Thecollar 30 thus formed is adapted to be secured to an air bag (not shown)by conventional means, such as glue, in order to form a manuallyclosable vacuum cleaner bag.

The blank 12 is formed of relatively rigid material defining threegenerally rectangular, generally planar panels 20, 22 and 24. Foldlines26 are disposed between the panels 20, 22 and the panels 22, 24. Thefoldlines enable the first and third panels 20, 24 to be pivotedrelative to the second panel 22 (see FIGS. 3 and 4) so that the threepanels 20, 22, 24 are in overlying disposition, thereby to define thepaperboard aspects of the collar seen in FIGS. 4-7.

Each of the panels 20, 22, 24 defines a respective aperture therethrough20a, 22a, 24a. In the collar 30, the various apertures 20a, 22a, 24a areinitially aligned to enable the passage of air and/or an air intake (notshown) therethrough and into the air bag. The apertures 20a and 22a arepreferably of equal diameter, with the aperture 24a optionally being oflesser diameter and thus the constraining element in the flow of airamong the several apertures of the collar 30.

To assist the viewer in seeing the transformation from the blank 12 ofFIG. 1 to the collar 30 of FIG. 5, it should be noted that the first andsecond panels 20 and 22 of the blank 12 will be the outer panels of thecollar 30, while the third panel 24 will be the intermediate paneldisposed between the outer panels 20, 22 in the collar 30.

The third or intermediate panel 24 contains a closure element. Moreparticularly, as best seen in FIG. 1, the third or intermediate panel 24of the collar 30 defines a fixed raceway element 40 and a detachableslider element or closure 42. Cut lines 27 almost entirely separateelements 40 and 42 of panel 24. The slider element 42 remains secured tothe raceway element 40 only by various nicks 44 (four nicks beingillustrated). The nicks 44 are barely visible bridges connecting thefour corner edges of the slider element 42 to the adjacent edges of theraceway element 40. Each of the nicks 44 may constitute one or more ofsuch bridges, the nicks being strong enough assisting in maintaining theslider element 42 in position relative to the raceway element 40 duringthe manufacturing process and even during handling by the ultimate user,but weak enough to be easily (and almost imperceptibly) broken when theuser initially attempts to close and seal the collar 30 by relocatingthe slider element 42. No special action by the user is required tobreak the nicks

As best seen in FIG. 1, the slider element 42 has a first portion 46which defines the aperture 24a and a second portion 48 which isunapertured. When the slider element 42 is detached from the racewayelement 40 by a user breaking the various nicks 44, the slider element42 becomes slidably movable from a first or open position, wherein theaperture 24a of the slider element is aligned with the apertures 20a,22a of the outer panels 20, 22 for enabling gaseous communicationtherebetween, to a second or closed position, wherein the unaperturedsecond portion 48 is aligned with and blocks air flow between theapertures 20a, 22a of the outer panels 20, 22 for blocking gaseouscommunication therebetween.

Referring now to FIG. 2, a resilient membrane 28, typically ofrectangular configuration, is disposed on one of the outer panels 20, 22(as illustrated, on outer panel 20) and defines an aperture 28atherethrough which will be aligned with the apertures 20a, 22a of theouter panels and with the aperture 24a of the intermediate panel 24 whenthe panels 20, 22, 24 are folded to form the collar 30 and the sliderelement 42 is in the first or open position. The aperture 28a is smallerthan the aperture 20a, 22a, 24a, but enlarges when in place on the airintake pipe.

Typically, the resilient membrane 28 is not glued to any panel, as gluedeleteriously affects the rubber membrane, and the tightness of theadjacent faces of panels 20, 22, one against the other, in the collar 30are adequate to maintain the resilient membrane 28 in the desiredposition.

Glue 31 (represented in the drawing by speckling) is placed either onthe raceway element 40, as seen in FIG. 2, or on the portion of theouter panel 22 which will be contacted by the raceway element 40 in thecollar 30.

Referring now to FIG. 3, the intermediate panel 24 is pivoted alongfoldline 26, in the direction of arrow A, until it overlies the outerpanel 22 (thus hiding most of outer panel 22 from sight in FIG. 3) Glue31 bonds the panels 22, 24 together.

Referring now to FIG. 4, glue 31 is disposed on the portions of theouter panel 20 which will be contacted by the raceway element 40 in thecollar 30, as illustrated, or alternatively on the exposed surface ofthe raceway element 40. Then the outer panel 20 is pivoted alongfoldline 26, in the direction of arrow B, until it overlies the exposedface of the intermediate panel 24 (thus hiding most of intermediatepanel 24 from view in FIG. 4). Glue 31 bonds the panels 20, 24 together,with resilient membrane 28 therebetween, thereby to form the collar 30of the present invention.

To facilitate breaking of the nicks 44, and generally to facilitatemovement of the slider element 44 relative to the raceway element 40,the slider element 42 preferably includes a grasping portion 60 (asillustrated, the top portion thereof) extending beyond the outer panels20, 22 of the collar 30 and enabling manual grasping of the sliderelement 42 by the user's fingers for detaching of the slider element 42from the raceway element 40 and for subsequent movement thereof from thefirst or open position to the second or closed position. To provide thisgrasping portion 60 on the slider element 42, the outer panels 20, 22preferably define recesses 29 enabling the user's fingers to grasp theprojecting grasping portion 60 of the slider element 42.

To prevent a self-defeating movement of the slider element 42 whichresults in its over-extension, or even separation, from the racewayelement 40, preferably the slider element 42 has the generalconfiguration of an inverted "T", with the horizontal base defining apair of stop ledges 52, and the raceway element 40 has the generalconfiguration of a "U" with the legs defining a pair of inwardlyextending stop flanges 54. When the unapertured second portion of theslider element 42 is properly positioned to block air flow between theapertures 20a, 22a of the outer panels 20, 22, further movement of theslider element 42 out of the raceway element 40 is blocked by theabutting engagement of the stop ledges 52 and stop flanges 54. The outerpanels 20, 22, through their common adhesive bonding with the racewayelement 40, maintain the slider element 42 and the raceway element 40 insubstantially the same plane, thereby ensuring the appropriate abutmentof stop ledges 52 and stop flanges 54 in the closed position.

The blank 12 preferably defines a plurality of small cutouts or notches70 along the foldlines 26, the free longitudinal edges of the blank 12,and the grasping portion 60 of the slider element 42. As best seen inFIG. 5, in the collar 30 the cutouts at notches 70 along the foldlines26 and the free longitudinal edges of the panels form semicircularnotches on the longitudinal edges of the collar 30 to facilitate holdingthereof, while the circular cutout 70 on the grasping portion 60 of theslider element 42 facilitates finger grasping of the slider element 42for breakage of the nicks 44 and sliding movement of the slider element42 relative to the raceway element 40 (and hence the remainder of thecollar 30).

While the aperture 24a of the intermediate panel 24 is illustrated asbeing of lesser diameter than the apertures 20a, 22a of the outer panels20, 22, this typically results from the lesser width of the sliderelement 42 relative to the width of the outer panels 20, 22. Where theslider element 42 is of sufficient width, the aperture 24a therein maybe of equal or greater diameter than the apertures 20a, 22a of the outerpanels 20, 22.

The blank 12 is preferably formed of board which is coated on only oneside, as illustrated in FIG. 1 the back side of the blank 12. As onefollows the folding of the blank from FIG. 1 through FIG. 4, it will beobserved that the outer or visible surfaces of the outer panels 20, 22of the collar 30 are formed by the coated side of the board and thuslend themselves well to printing for decorative, informative, oraesthetic content. Importantly, it is the coated surface of the sliderelement 42 of intermediate panel 24 which abuts and presses against theresilient membrane 28 disposed between the intermediate panel 24 and theouter panel 20 in the collar 30. As the resilient membrane 28 is held inplace only by frictional forces between the two adjacent panels 20, 24,and not by any glue or adhesive, the coated surface of the sliderelement 42 enables the slider element 42 to be moved relative to theresilient membrane 28 with relatively little friction therebetween, sothat there is little tendency of the resilient membrane 28 to crumple upand thereby block further movement of the slider element 42.

Referring now to FIGS. 9-15, therein illustrated is a second embodimentof the present invention, generally designated 10'. Elements of thesecond embodiment 10' which are functionally equivalent to elements ofthe first embodiment 10 are identified by the same reference numeral.

Broadly speaking, the basic difference between the two embodiments 10,10' is that, in order to effect closure of the collar, in the firstembodiment 10 the generally rectangular slider element 42 undergoeslongitudinal sliding movement relative to the generally U-shaped racewayelement 40 (as best seen by a comparison of FIGS. 4 and 5), whereas inthe second embodiment 10' the generally circular slider elementundergoes a rotational sliding movement relative to the interruptedcircular raceway element 40 resembling a pair of parentheses (as bestseen by a comparison of FIGS. 12 and 13).

While FIG. 13 illustrates the closing movement of the slider element 42as proceeding in a clockwise direction, clearly an equally effectiveclosure can be effected by means of a counterclockwise movement of theslider element 42. A ninety degree rotation in either directiontypically suffices to bring an unapertured portion of the slider element42 intermediate panel apertures 20a, 22a and thereby close the collar30.

In order to effect rotation of the slider element 42 relative to theraceway element 40, the user grasps the grasping portion 60 of theslider element 42 (projecting through the double width recess 29 jointlyformed by the outer panels 20, 22) and rotates the same relative to theremainder of the collar 30. In initiating rotational movement of theslider element the user easily and typically imperceptibly breaks thefour nicks 44 at the interface of the slider element 42 and the racewayelement 40 along the two longitudinal edges of the intermediate panel24.

In the second embodiment 10', there is no need for means to precludewithdrawal of the slider element 42 entirely from the raceway element40. Thus, there is no need for stop flanges 52 and stop ledges 54.

To summarize, the present invention provides a manually closable collarfor a vacuum cleaner bag. The collar is economical to manufacture asdoes not require the collar to include a flexible portion and is easy tomanufacture as it does not require a final cutting step in order to freethe closure member (or sliding element) for movement relative to theremainder of the collar.

Now that the preferred embodiments of the present invention have beenshown and described in detail, various modifications and improvementsthereon will become readily apparent to those skilled in the art.Accordingly, the spirit and scope of the present invention is to beconstrued broadly and limited only by the appended claims, and not bythe foregoing specification.

I claim:
 1. A manually closable collar for a vacuum cleaner bag,comprising:a collar adapted to be secured to an air bag and formed froma single blank of relatively rigid material folded to define threeoverlying and generally planar panels, each of said panels defining anaperture therethrough, said apertures being initially aligned in saidcollar to enable the passage of air therethrough and into the air bag,the middle panel of said collar defining:(i) a fixed, raceway elementadhesively secured to at least one of the outer panels of said collar,and (ii) a detachable slider element secured to said raceway elementonly by various nicks, said slider element having a first portiondefining said aperture of said middle panel and a second portion whichis unapertured; when detached from said raceway element by a userbreaking the various nicks, said slider element being manually slidablymovable from a first or open position, wherein said aperture of saidmiddle panel is aligned with the apertures of said outer panels, to asecond or closed position, wherein said second portion blocks air flowbetween said apertures of said outer panels.
 2. The collar of claim 1wherein said raceway element includes means for precluding removal ofsaid slider element entirely from said raceway element after said sliderelement is detached from said raceway element.
 3. The collar of claim 1wherein said aperture of said middle panel is smaller than saidapertures of said outer panels.
 4. The collar of claim 1 wherein saidslider element additionally includes means extending beyond said outerpanels and enabling manual grasping of said slider element for detachingof said slider element from said raceway element and for movementthereof from said first or open position to said second or closedposition.
 5. The collar of claim 1 wherein said slider element isaxially slidably movable from said first or open position to said secondor closed position.
 6. The collar of claim 1 wherein said slider elementis rotatably slidably movable from said first or open position to saidsecond or closed position.
 7. The collar of claim 1 additionallyincluding:a resilient membrane intermediate said middle panel and one ofsaid outer panels and defining an aperture therethrough aligned withsaid apertures of said outer panels and with said aperture of saidmiddle panel when said slider element is in said first or open position.8. A manually closable collar for a vacuum cleaner bag, comprising:(A) acollar adapted to be secured to an air bag and formed from a singleblank of relatively rigid material folded to define three overlying andgenerally planar panels, each of said panels defining an aperturetherethrough, said apertures being initially aligned in said collar toenable the passage of air therethrough and into the air bag, saidaperture of the middle panel of said collar being smaller than saidapertures of the outer panels, said middle panel of said collardefining(i) a fixed raceway element adhesively secured to at least oneof said outer panels of said collar, and (ii) a detachable sliderelement secured to said raceway element only by various nicks, saidslider element having a first portion defining the aperture of saidmiddle panel and a second portion which is unapertured; when detachedfrom said raceway element by a user breaking the various nicks, saidslider element being manually slidably movable from a first or openposition, wherein said aperture of said middle panel is aligned with andenables air flow between the apertures of said outer panels, to a secondor closed position, wherein said second portion is aligned with andblocks air flow between said apertures of said outer panels; said sliderelement additionally including means extending beyond said outer panelsand enabling manual grasping of said slider element for detaching ofsaid slider element from said raceway element and for movement thereoffrom said first or open position to said second or closed position; saidraceway element further including means for precluding removal of saidslider element entirely from said raceway element after said sliderelement is detached from said raceway element; and (B) a resilientmembrane intermediate said middle panel and one of said outer panels anddefining an aperture therethrough aligned with said apertures of saidouter panels and with said aperture of said middle panel when saidslider element is in said first or open position.